Siemens 6ES7374-2XH01-0AA0 Simatic S7-300 Module

Siemens 6ES7374-2XH01-0AA0 Simatic S7-300 SM374 Simulator is a spare-part I/O simulator card for the SIMATIC S7-300 PLC family. It’s designed to plug into the S7-300 backplane and provides a configurable 16-point I/O simulator that can emulate 16 digital inputs or 16 digital outputs, or a mixed configuration of 8 inputs and 8 outputs. The module uses 16 front-panel switches and 16 LEDs to visualize and control the simulated I/O, offering a compact way to test PLC logic and ladder logic offline. Powered from the backplane bus at 5 V DC with a maximum current draw of 80 mA, it typically consumes about 0.35 W; its physical dimensions are 40 mm wide, 125 mm high, and 120 mm deep, with an approximate weight of 190 g. As a SIMATIC S7-300 spare part, SM374 is commonly used in development, training, or lab environments to simulate I/O without external field devices.